<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>CSS的外部样式</title>
        <!--引用外部样式-->
        <link rel="stylesheet" href="css/indexTest.css">
    </head>
    <body>
        <div>我是容器标签</div>
        <p>我是段落标签</p>
    </body>
</html>